package org.codehaus.mojo.animal_sniffer.ant;

/*
 * The MIT License
 *
 * Copyright (c) 2008 Kohsuke Kawaguchi and codehaus.org.
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 * THE SOFTWARE.
 *
 */

import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.util.Vector;

import org.apache.tools.ant.BuildException;
import org.apache.tools.ant.Project;
import org.apache.tools.ant.Task;
import org.apache.tools.ant.types.Path;
import org.codehaus.mojo.animal_sniffer.SignatureBuilder;

/**
 * @author Kohsuke Kawaguchi
 */
public class BuildSignaturesTask extends Task {

    private File destfile;

    private Vector<Path> paths = new Vector<>();

    private Vector<Signature> signatures = new Vector<>();

    private Vector<Ignore> includeClasses = new Vector<>();

    private Vector<Ignore> excludeClasses = new Vector<>();

    public void setDestfile(File dest) {
        this.destfile = dest;
    }

    public void addPath(Path path) {
        paths.add(path);
    }

    public Signature createSignature() {
        Signature signature = new Signature();
        signatures.add(signature);
        return signature;
    }

    public Ignore createIncludeClasses() {
        final Ignore result = new Ignore();
        includeClasses.add(result);
        return result;
    }

    public Ignore createExcludeClasses() {
        final Ignore result = new Ignore();
        excludeClasses.add(result);
        return result;
    }

    protected void validate() {
        if (destfile == null) {
            throw new BuildException("destfile not set");
        }
        if (paths.size() < 1) {
            throw new BuildException("path not set");
        }
        for (Signature signature : signatures) {
            if (signature.getSrc() == null) {
                throw new BuildException("signature src not set");
            }
            if (!signature.getSrc().isFile()) {
                throw new BuildException("signature " + signature.getSrc() + " does not exist");
            }
        }
        for (Ignore tmp : includeClasses) {
            if (tmp.getClassName() == null) {
                throw new BuildException("includeClasses className not set");
            }
        }
        for (Ignore tmp : excludeClasses) {
            if (tmp.getClassName() == null) {
                throw new BuildException("excludeClasses className not set");
            }
        }
    }

    public void execute() throws BuildException {
        validate();
        try {
            Vector<InputStream> inStreams = new Vector<>();
            for (Signature signature : signatures) {
                log("Importing signatures from " + signature.getSrc());
                inStreams.add(new FileInputStream(signature.getSrc()));
            }

            SignatureBuilder builder = new SignatureBuilder(
                    inStreams.toArray(new InputStream[0]), new FileOutputStream(destfile), new AntLogger(this));
            for (Ignore tmp : includeClasses) {
                builder.addInclude(tmp.getClassName());
            }
            for (Ignore tmp : excludeClasses) {
                builder.addExclude(tmp.getClassName());
            }
            for (Path path : paths) {
                final String[] files = path.list();
                for (String file : files) {
                    log("Capturing signatures from " + file, Project.MSG_INFO);
                    process(builder, new File(file));
                }
            }
            builder.close();
        } catch (IOException e) {
            throw new BuildException(e);
        }
    }

    private void process(SignatureBuilder builder, File f) throws IOException {
        if (f.exists()) {
            builder.process(f);
        }
    }
}
